Effect of conservation agriculture on soil hydro-physical properties under diversified maize (Zea mays)-based cropping systems

Brijesh Yadav; Prameela Krishnan; C M Parihar; Suresh Yadav

doi:10.56093/ijas.v90i9.106634

Authors

Brijesh Yadav Ph D Scholar, Division of Agricultural Physics, ICAR-Indian Agricultural Research Institute, New Delhi 110 012 , India
Prameela Krishnan Head & Principal Scientist and corresponding author, Division of Agricultural Physics, ICAR-Indian Agricultural Research Institute, New Delhi 110 012 , India
C M Parihar Senior Scientist, Division of Agronomy, ICAR-Indian Agricultural Research Institute, New Delhi 110 012 , India
Suresh Yadav Ph D Scholar, Division of Genetics, ICAR-Indian Agricultural Research Institute, New Delhi 110 012 , India

https://doi.org/10.56093/ijas.v90i9.106634

Keywords:

Conservation agriculture, Bulk density, Hydraulic conductivity, Soil infiltration rate

Abstract

Rice (Oryza sativa L.)-wheat (Triticum aestivum L.) cropping system of the Indo-Gangetic Plains is under threat due to multiple challenges of degrading soil structure, depleting soil organic carbon, declining water level and increasing multi-nutrient deficiencies making farming uneconomical and unsustainable. Conservation agriculture (CA) based tillage practices along with optimization of cropping systems have shown to produce more with less inputs. Therefore, an experiment was conducted to evaluate the impact of tillage practices, viz. zero tillage with residue retention (ZT + R) and conventional tillage with residue incorporation (CT + R), under diversified maize based cropping system (maize-wheat-mungbean and maize-mustard-mungbean) on soil hydro-physical properties at IARI, New Delhi. Compared to CT+R, bulk density (BD) showed significant (P < 0.05) decline (3.4-7.7% and 1.2 -2.4 %) under ZT+R at 0–30 and 30-60 cm soil depths but the impact of cropping system was non-significant. The saturated hydraulic conductivity
(K_sat) was significantly (P < 0.05) increased by 12.1, 13.9, 20.0 and 17.6% under ZT+R for 0–15, 15–30, 30-45 and 45-60 cm soil depths, respectively as compared to CT+R. Initial and final infiltration rate and cumulative infiltration were significantly higher in ZT+R than CT+R. Overall, our results suggest that adoption of zero tillage with residue retention under maize-wheat-mungbean (MWMb) systems can improve the soil hydro-physical properties.

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